This is a slightly trickier proposition. The new downloaders are for the mirrors, so you would have to be browsing nitter.eu or nitter.nixnet.services, and then HC would recognise that as the nitter mirror and line you up correct.

If you know the downloader system well, you could probably hook up an 'API link' from nitter.com to one of the mirrors, but it would be easier just to browse a mirror instead.